Oee and salt deier



(N0 Mode l.)

R. A. NEVIN.

ORE AND SALT DRIER.

Patented June 9, 1885.

WEM/V/ WITNESSES INVENTOR BY Jaw ATTORNEYS.

' N. PETERS Fhokoljtbcgnphur, WasNngion. D Q

UNITE a'rnn'r Orrrce.

ORE AND SALT DRIER.

QPECIPICATION forming part of Letters Patent No. 319,610, dated June 9, 1885.

Application filed June 14, 1884. (N0 model.)

To all whom it may concern:

Be it known-that I, Bonner A. NEVIN, of San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Ore and Salt Driers, of which the following is a full, clear, and exact description.

My invention relates to means for drying ores preparatory to pulverizing and chloridizing the ores; and also for drying the salt to be used in the chloridizing process, the object being to economize fuel in the recovery of the precious metals.

The invention consists in the peculiar construction and arrangement of parts, as hereinafter'fullydescribed, and pointed out in the claim.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 is a side elevation of ore desulphurizing and chloridizing furnaces with my improvement applied to the former, and with the stack broken away; and Fig. 2 is a plan view of the same.

The letter A indicates my improved drier, or rather my improved arrangement of the drier, which is in this instance shown as located to receive the waste heat from the desulphurizing-furnace B; but the drier may be positioned to receive the waste heat from the chloridizing-furnace C, or from both B and C.

The furnaces B C may have any approved construction, and in the drawings the drier and furnaces are shown mounted, respectively, on rollers a b c, and to be revolved to carry the ores down their inclined interiors by gravity, motion being imparted by the gears and worms a b c, or in any other suitable manner.

Instead of passing the products of combuslion from the furnace B direct to the stack D continuously, I have located the drier A so as to receive and utilize the waste heat of this furnace, by arranging a suit-able damper, E, in the direct passage F, beneath the drier, from the furnace B to the stack D, so that when said damper E is closed and the damper G, fitted in the mouth of the drier A, is open the heat from furnace B shall pass through the drier A and its fine H to the stack; but when the drier A is inoperative, or if, for any cause, the heat of furnace B is not to be passed through the drier. the damper G will be closed and the damper E opened.

It is evident that another drier may be 10- per .end of the drier. They then pass through the latter and aredischarged at the opposite end of a chute, L, in a thoroughly dried con- 7 dition, ready for pulverization and subsequent treatment in the furnaces B C. The salt is treated in a like manner.

I do not limit myself to the precise arrangement of the dampers E G, herein shown and described, as any suitably-contrived damper or dampers which will control the passage of the heat from the furnace, either through the drier or to the stack direct, may be employed.

My invention secures the drying of the ores or salt without expense for fuel, and with little expense for labor, and in these respects is a valuable improvement over the old methods.

At B is shown a chute through which the ores are fed to the desulphurizer B, from which they pass by a chute (dotted) to the chloridizer 0, being mixed with salt introduced through a chute, C, in substantially the same manner as described in my Patent No. 248,199, dated October 11, 1881.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is Y The combination, with the rotating drier A, ore-roaster B, and stack D, of the flues'F H, and the dampers E G, substantially as shown and described.

' ROBERT A. NEVIN.

Witnesses:

WM. S. CAMPBELL, J. B. PARKMAN. 

